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Curious: Does the usage of CoreOS replace Docker OSX's virtualbox linux VM it uses? And if not, is there any reason why KubeSolo couldn't be designed to run on that VM, just to save resources?

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Docker for Mac ditches VirtualBox and uses a more native xhyve. Also, I believe, Alpine Linux is used as the OS for the xhyve VM.

This uses the same Xhyve driver with CoreOS as base OS.

Yes, but why does this depend on Docker for OS X if it's not reusing Docker's Alpine VM?

Docker's new Alpine VM isn't really designed to be reused. AFAICT the interfaces are private and undocumented.

Reusing xhyve/hyperkit seems more stable, given that they're designed to be embedded.

No, this does not depend on Docker for OS X. They both use the underlying driver.

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